Re: [PATCH 1/1] file capabilities: clear fcaps on inode change (v2)

[James Morris <jmorris@namei.org>]

On Mon, 6 Aug 2007, Serge E. Hallyn wrote:

> +	err = security_inode_killpriv(out->f_path.dentry, LSM_NEED_LOCK);
> +	if (err)
> +		return err;
> +
>  	err = should_remove_suid(out->f_path.dentry);
>  	if (unlikely(err)) {
>  		mutex_lock(&inode->i_mutex);

It seems hackish to pass a needlock arg to an API, and that that we'll end 
up with some conceptually similar call-outs for both caps and setuid.

How about encapsulating this stuff so that there's something like:


	err = should_remove_privs();
	if (err)
		remove_privs();

with

void remove_privs()
{
	mutex_lock();
	__remove_privs();
	mutex_unlock();
}

and then __remove_privs() handles the logic for all file privileges, 
including at this stage suid and the LSM call for file caps ?



- James
-- 
James Morris
<jmorris@namei.org>
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